This file capdist.csv contains the great circle distance between capital cities
in the kilometers for all states in the file latlong.csv, which contains
the latitude and longitude of the capital cities.

As a courtesy to people who have somehow failed to realize that
the metric system is 10 times
better the file also contains distances in miles. (The imperial system is currently
used in only three countries, the USA, Myanmar, and Liberia.)

The capdist.csv data can be generated from latlong.csv with the
perl program capdist.pl

People interested in these data may also wish to consult the more recent
Cshapes project, which
provides historical maps and an R package to perform various useful operations on
the GIS maps, including calculating minimum distances between states